Staff directory

Belén Ballesteros Pérez

Division Leader
belen.ballesteros(ELIMINAR)@icn2.cat - Tel. +34937371608
Electron Microscopy Division

Publications

2017

  • Evaluation of the immunological profile of antibody-functionalized metal-filled single-walled carbon nanocapsules for targeted radiotherapy

    Perez Ruiz De Garibay A., Spinato C., Klippstein R., Bourgognon M., Martincic M., Pach E., Ballesteros B., Ménard-Moyon C., Al-Jamal K.T., Tobias G., Bianco A. Scientific Reports; 7 ( 42605) 2017. 10.1038/srep42605.

    This study investigates the immune responses induced by metal-filled single-walled carbon nanotubes (SWCNT) under in vitro, ex vivo and in vivo settings. Either empty amino-functionalized CNTs [SWCNT-NH 2 (1)] or samarium chloride-filled amino-functionalized CNTs with [SmCl 3 @SWCNT-mAb (3)] or without [SmCl 3 @SWCNT-NH 2 (2)] Cetuximab functionalization were tested. Conjugates were added to RAW 264.7 or PBMC cells in a range of 1 μg/ml to 100 μg/ml for 24 h. Cell viability and IL-6/TNFα production were determined by flow cytometry and ELISA. Additionally, the effect of SWCNTs on the number of T lymphocytes, B lymphocytes and monocytes within the PBMC subpopulations was evaluated by immunostaining and flow cytometry. The effect on monocyte number in living mice was assessed after tail vein injection (150 μg of each conjugate per mouse) at 1, 7 and 13 days post-injection. Overall, our study showed that all the conjugates had no significant effect on cell viability of RAW 264.7 but conjugates 1 and 3 led to a slight increase in IL-6/TNFα. All the conjugates resulted in significant reduction in monocyte/macrophage cell numbers within PBMCs in a dose-dependent manner. Interestingly, monocyte depletion was not observed in vivo, suggesting their suitability for future testing in the field of targeted radiotherapy in mice. © The Author(s) 2017.


  • Filling Single-Walled Carbon Nanotubes with Lutetium Chloride: A Sustainable Production of Nanocapsules Free of Nonencapsulated Material

    Kierkowicz M., González-Domínguez J.M., Pach E., Sandoval S., Ballesteros B., Da Ros T., Tobias G. ACS Sustainable Chemistry and Engineering; 5 (3): 2501 - 2508. 2017. 10.1021/acssuschemeng.6b02850.

    Filled carbon nanotubes are of interest for a wide variety of applications ranging from sensors to magnetoelectronic devices and going through the development of smart contrast and therapeutic agents in the biomedical field. In general, regardless of the method employed, bulk filling of carbon nanotubes results in the presence of a large amount of external nonencapsulated material. Therefore, further processing is needed to achieve a sample in which the selected payload is present only in the inner cavities of the nanotubes. Here, we report on a straightforward approach that allows the removal of nonencapsulated compounds in a time efficient and environmentally friendly manner, using water as a "green" solvent, while minimizing the residual waste. The results presented herein pave the way toward the production of large amounts of high-quality closed-ended filled nanotubes, also referred to as carbon nanocapsules, readily utilizable in the foreseen applications. © 2017 American Chemical Society.


  • Functionalization of Polypyrrole Nanopipes with Redox-Active Polyoxometalates for High Energy Density Supercapacitors

    Dubal D.P., Ballesteros B., Mohite A.A., Gómez-Romero P. ChemSusChem; 10 (4): 731 - 737. 2017. 10.1002/cssc.201601610.

    Hybrid materials are very attractive for the fabrication of high-performance supercapacitors. Here, we have explored organic–inorganic hybrid materials based on open-end porous 1 D polypyrrole nanopipes (PPy-NPipes) and heteropolyoxometalates (phosphotungstate ([PW12O40]3−, PW12) or phosphomolybdate ([PMo12O40]3−, PMo12)) that display excellent areal capacitances. Two different hybrid materials (PMo12@PPy and PW12@PPy) were effectively synthesized and used for symmetric supercapacitors. The anchoring of the inorganic nanoclusters onto the conducting polymer nanopipes led to electrodes that stood up to our best expectations exhibiting outstanding areal capacitances that are almost 1.5 to 2 fold higher than that of pristine PPy-NPipes. In addition, symmetric cells based on PMo12@PPy and PW12@PPy hybrid electrodes were fabricated and showed significant improvement in cell performance with very high volumetric capacitances in the range of 6.3–6.8 F cm−3 (considering the volume of whole device). Indeed, they provide extended potential windows in acidic electrolytes (up to 1.5 V) which led to ultrahigh energy densities of 1.5 and 2.2 mWh cm−3 for PMo12@PPy and PW12@PPy cells, respectively. Thus, these unique organic-inorganic hybrid symmetric cells displayed extraordinary electrochemical performances far exceeding those of more complex asymmetric systems. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim


  • Multi-scale analysis of the diffusion barrier layer of gadolinia-doped ceria in a solid oxide fuel cell operated in a stack for 3000 h

    Morales M., Miguel-Pérez V., Tarancón A., Slodczyk A., Torrell M., Ballesteros B., Ouweltjes J.P., Bassat J.M., Montinaro D., Morata A. Journal of Power Sources; 344: 141 - 151. 2017. 10.1016/j.jpowsour.2017.01.109.

    The state-of-the-art materials for SOFCs are yttria-stabilized zirconia as electrolyte and lanthanum strontium cobalt ferrite as cathode. However, the formation of insulating phases between them requires the use of diffusion barriers, typically made of gadolinia doped ceria. The study of the stability of this layer during the fabrication and in operando is currently one of the major goals of the SOFC industry. In this work, the cation inter-diffusion at the cathode/barrier layer/electrolyte region is analysed for an anode-supported cell industrially fabricated by conventional techniques, assembled in a short-stack and tested under real operation conditions for 3000 h. A comprehensive study of this cell, and an equivalent non-operated one, is performed in order to understand the inter-diffusion mechanisms with possible effects on the final performance. The analyses evidence that the cation diffusion is occurring during the fabrication process. Despite the significant diffusion of Ce,Gd, Zr, Y and Sr cations, the formation of typically reported CGO-YSZ solid solution is not observed while the presence of isolated grains of SrZrO3 is proved. All in all, this study presents new insights into the stability of the typically employed diffusion barriers for solid oxide cells that will guide future strategies to improve their performance and durability. © 2017 Elsevier B.V.


  • Nanosecond Laser-Assisted Nitrogen Doping of Graphene Oxide Dispersions

    Kepić D., Sandoval S., Pino Á.P.D., György E., Cabana L., Ballesteros B., Tobias G. ChemPhysChem; 18 (8): 935 - 941. 2017. 10.1002/cphc.201601256.

    N-doped reduced graphene oxide (RGO) has been prepared in bulk form by laser irradiation of graphene oxide (GO) dispersed in an aqueous solution of ammonia. A pulsed Nd:YAG laser with emission wavelengths in the infrared (IR) 1064 nm, visible (Vis) 532 nm, and ultraviolet (UV) 266 nm spectral regions was employed for the preparation of the N-doped RGO samples. Regardless of the laser energy employed, the resulting material presents a higher fraction of pyrrolic nitrogen compared to nitrogen atoms in pyridinic and graphitic coordination. Noticeably, whereas increasing the laser fluence of UV and Vis wavelengths results in an increase in the total amount of nitrogen, up to 4.9 at. % (UV wavelength at 60 mJ cm−2 fluence), the opposite trend is observed when the GO is irradiated in ammonia solution through IR processing. The proposed laser-based methodology allows the bulk synthesis of N-doped reduced graphene oxide in a simple, fast, and cost efficient manner. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim


2016

  • Carbon nanotubes allow capture of krypton, barium and lead for multichannel biological X-ray fluorescence imaging

    Serpell C.J., Rutte R.N., Geraki K., Pach E., Martincic M., Kierkowicz M., De Munari S., Wals K., Raj R., Ballesteros B., Tobias G., Anthony D.C., Davis B.G. Nature Communications; 7 ( 13118) 2016. 10.1038/ncomms13118. IF: 11.329

    The desire to study biology in situ has been aided by many imaging techniques. Among these, X-ray fluorescence (XRF) mapping permits observation of elemental distributions in a multichannel manner. However, XRF imaging is underused, in part, because of the difficulty in interpreting maps without an underlying cellular 'blueprint'; this could be supplied using contrast agents. Carbon nanotubes (CNTs) can be filled with a wide range of inorganic materials, and thus can be used as 'contrast agents' if biologically absent elements are encapsulated. Here we show that sealed single-walled CNTs filled with lead, barium and even krypton can be produced, and externally decorated with peptides to provide affinity for sub-cellular targets. The agents are able to highlight specific organelles in multiplexed XRF mapping, and are, in principle, a general and versatile tool for this, and other modes of biological imaging. © 2016 The Author(s).


  • Design of antibody-functionalized carbon nanotubes filled with radioactivable metals towards a targeted anticancer therapy

    Spinato C., Perez Ruiz De Garibay A., Kierkowicz M., Pach E., Martincic M., Klippstein R., Bourgognon M., Wang J.T.-W., Ménard-Moyon C., Al-Jamal K.T., Ballesteros B., Tobias G., Bianco A. Nanoscale; 8 (25): 12626 - 12638. 2016. 10.1039/c5nr07923c. IF: 7.760

    In the present work we have devised the synthesis of a novel promising carbon nanotube carrier for the targeted delivery of radioactivity, through a combination of endohedral and exohedral functionalization. Steam-purified single-walled carbon nanotubes (SWCNTs) have been initially filled with radioactive analogues (i.e. metal halides) and sealed by high temperature treatment, affording closed-ended CNTs with the filling material confined in the inner cavity. The external functionalization of these filled CNTs was then achieved by nitrene cycloaddition and followed by the derivatization with a monoclonal antibody (Cetuximab) targeting the epidermal growth factor receptor (EGFR), overexpressed by several cancer cells. The targeting efficiency of the so-obtained conjugate was evaluated by immunostaining with a secondary antibody and by incubation of the CNTs with EGFR positive cells (U87-EGFR+), followed by flow cytometry, confocal microscopy or elemental analyses. We demonstrated that our filled and functionalized CNTs can internalize more efficiently in EGFR positive cancer cells. © The Royal Society of Chemistry 2016.


  • Gadolinium-functionalised multi-walled carbon nanotubes as a T1 contrast agent for MRI cell labelling and tracking

    Servant A., Jacobs I., Bussy C., Fabbro C., Da Ros T., Pach E., Ballesteros B., Prato M., Nicolay K., Kostarelos K. Carbon; 97: 126 - 133. 2016. 10.1016/j.carbon.2015.08.051. IF: 6.198

    The development of efficient contrast agents for cell labelling coupled with powerful medical imaging techniques is of great interest for monitoring cell trafficking with potential clinical applications such as organ repair and regenerative medicine. In this paper, functionalised multi-walled carbon nanotubes (MWNTs) were engineered for cell labelling in T1-weighted MRI applications. These sophisticated constructs were covalently functionalised with the gadolinium (Gd) chelating agent, diethylene triamine pentaacetic acid (DTPA), enabling tight attachment of Gd atoms onto the nanotube surface. The resulting Gd-labelled MWNTs were found to be stable over 2 weeks in water and mouse serum and high payload of Gd atoms could be loaded onto the nanotubes. The r1 relaxivity of the Gd-MWNTs was a 3-fold higher than of the clinically approved T1 contrast agent Magnevist at a magnetic field strength of 7T. The contrast efficiency, expressed as the r1 relaxivity, of the Gd-MWNTs in Human Umbilical Vein Endothelial cells (HUVEC) was investigated at 7T and was found to be around 6.6 mM-1 s-1. There was no reduction of the contrast efficiency after internalisation in HUVECs, which was imparted to the ability of carbon nanotubes to translocate the cell membrane. © 2015 The Authors. Published by Elsevier Ltd.


  • Highly Dispersible and Stable Anionic Boron Cluster-Graphene Oxide Nanohybrids

    Cabrera-González J., Cabana L., Ballesteros B., Tobias G., Núñez R. Chemistry - A European Journal; 22 (15): 5096 - 5101. 2016. 10.1002/chem.201505044. IF: 5.771

    An efficient process to produce boron cluster-graphene oxide nanohybrids that are highly dispersible in water and organic solvents is established for the first time. Dispersions of these nanohybrid materials in water were extraordinarily stable after one month. Characterization of hybrids after grafting of appropriate cobaltabisdicarbollide and closo-dodecaborate derivatives onto the surface of graphene oxide (GO) was done by FT-IR, XPS, and UV/Vis. Thermogravimetric analysis (TGA) clearly shows a higher thermal stability for the modified-GO nanohybrids compared to the parent GO. Of particular note, elemental mapping by energy-filtered transmission electron microscopy (EFTEM) reveals that a uniform decoration of the graphene oxide surface with the boron clusters is achieved under the reported conditions. Therefore, the resulting nanohybrid systems show exceptional physico-chemical and thermal properties, paving the way for an enhanced processability and further expanding the range of application for graphene-based materials. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


  • Synthesis of dry SmCl3from Sm2O3revisited. Implications for the encapsulation of samarium compounds into carbon nanotubes

    Martincic M., Frontera C., Pach E., Ballesteros B., Tobias G. Polyhedron; 116: 116 - 121. 2016. 10.1016/j.poly.2016.03.045. IF: 2.108

    Samarium is a rare-earth metal with several applications in materials science. It is used in organic chemistry as a reducing agent and it is the active payload in samarium-153 lexidronam, a drug being used for palliative treatment of bone metastases. Recently, the encapsulation of samarium compounds into the cavities of carbon nanotubes has attracted interest for the development of the next generation of radiopharmaceuticals. In the present study, we explore different routes to afford the encapsulation of samarium based materials into single-walled carbon nanotubes. Anhydrous samarium(III) chloride, despite being highly hygroscopic, raises as an excellent candidate to achieve a high filling efficiency. We provide a protocol that allows the synthesis of anhydrous samarium(III) chloride starting from samarium(III) oxide in a fast and simple manner. Synchrotron X-ray powder diffraction confirmed the crystallinity and purity of the synthesized SmCl3. © 2016 Elsevier Ltd


  • Synthesis, characterization, and thermoelectric properties of superconducting (BEDT-TTF)2I3 nanoparticles

    Chtioui-Gay I., Faulmann C., De Caro D., Jacob K., Valade L., De Caro P., Fraxedas J., Ballesteros B., Steven E., Choi E.S., Lee M., Benjamin S.M., Yvenou E., Simonato J.-P., Carella A. Journal of Materials Chemistry C; 4 (31): 7449 - 7454. 2016. 10.1039/c6tc01378c. IF: 5.066

    The synthesis of (BEDT-TTF)2I3 in the presence of two neutral amphiphilic molecules [N-octylfurfurylimine and 1-octanamine, N-(2-thienylmethylene)] leads to single and aggregated nanoparticles of 2 to 6 nm size. The samples contain highly crystalline nanoparticles of the βCO-(BEDT-TTF)2I3 phase, confirmed by XRD. Temperature dependent resistance and magnetic susceptibility studies evidence the superconducting transition characteristics of the βCO-(BEDT-TTF)2I3 phase. The I-V curve of a single nanoparticle aggregate, measured using AFM, exhibits an expected semiconductor-like behaviour. Thermoelectric studies led to a ZT of 1.47 × 10-3 at 300 K. © The Royal Society of Chemistry 2016.


2015

  • Cationic Liposome- Multi-Walled Carbon Nanotubes Hybrids for Dual siPLK1 and Doxorubicin Delivery in Vitro

    Pereira S., Lee J., Rubio N., Hassan H.A.F.M., Suffian I.B.M., Wang J.T.W., Klippstein R., Ballesteros B., Al-Jamal W.T., Al-Jamal K.T. Pharmaceutical Research; 32 (10): 3293 - 3308. 2015. 10.1007/s11095-015-1707-1. IF: 3.420

    Purpose: To formulate f-MWNTs-cationic liposome hybrids for the simultaneous delivery of siPLK1 and doxorubicin to cancer cells. Method: f-MWNTs-cationic liposome hybrids were prepared by the thin film hydration method where the lipid film was hydrated with 100 μg/ml or 1 mg/ml of ox-MWNTs-NH3 + or MWNTs-NH3 + in 5% dextrose. siRNA complexation and protection ability was determined by agarose gel electrophoresis. f-MWNTs and liposome interaction was evaluated using Nile Red (NR) fluorescence spectroscopy. Cellular uptake in A549 cells was assessed by flow cytometry. Silencing of target proteins was determined by Luciferase and MTT assays. Sub-G1 analysis was performed to evaluate apoptosis following co-delivery of siPLK1 and Doxorubicin (Dox). Results: Zeta potential and siRNA complexation profile obtained for all hybrids were comparable to those achieved with cationic liposomes. ox-MWNTs-NH3 + showed greater extent of interaction with cationic liposomes compared to MWNTs-NH3 +. ox-MWNTs-NH3 + was able to protect siRNA from nuclease-mediated degradation. Enhanced cellular uptake of both the carrier and loaded siRNA in A549 cell, were observed for this hybrid compared to the liposomal carrier. A synergistic pro-apoptotic effect was obtained when siPLK1 silencing was combined with doxorubicin treatment for the hybrid:siRNA complexes compared to the lipoplexes, in A549 cells in vitro. Conclusions: f-MWNTs-cationic liposome hybrid designed in this study can serve as a potential vehicle for the co-delivery of siRNA and cytotoxic drugs to cancer cells in vitro. © 2015 The Author(s).


  • Quantitative monitoring of the removal of non-encapsulated material external to filled carbon nanotube samples

    Martincic M., Pach E., Ballesteros B., Tobias G. Physical Chemistry Chemical Physics; 17 (47): 31662 - 31669. 2015. 10.1039/c5cp04664e. IF: 4.493

    The endohedral functionalization of carbon nanotubes with both organic and inorganic materials allows the development of tailored functional hybrids whose properties benefit from the synergistic effects of the constituent compounds. Bulk filling of carbon nanotubes (CNTs) results in samples that contain a large amount of non-encapsulated material external to the CNTs. The presence of the external material is detrimental to the processing and application of the resulting hybrids. Here we introduce the use of UV-Vis spectroscopy to monitor the cleaning process, i.e. the elimination of non-encapsulated compounds. Chrome azurol S has been employed to assess the bulk removal of external samarium(iii) chloride from filled single-walled carbon nanotubes. Chrome azurol S is of interest since it can be used to quantify a large variety of materials in a fast, accurate and reliable manner. The parameters that control the cleaning process have been optimized, including the time, temperature, volume and sonication, to achieve a fast and complete removal of the external material. © 2015 the Owner Societies.


  • Spin density wave and superconducting properties of nanoparticle organic conductor assemblies

    Winter L.E., Steven E., Brooks J.S., Benjamin S., Park J.-H., De Caro D., Faulmann C., Valade L., Jacob K., Chtioui I., Ballesteros B., Fraxedas J. Physical Review B - Condensed Matter and Materials Physics; 91 (3, 035437) 2015. 10.1103/PhysRevB.91.035437. IF: 3.736

    The magnetic susceptibilities of nanoparticle assemblies of two Bechgaard salts (TMTSF)2PF6 and (TMTSF)2ClO4, have been studied vs temperature and magnetic field. In the bulk these materials exhibit a spin density wave formation (TSDW=12K) and superconductivity (Tc=1.2K), respectively. We show from inductive (susceptibility) measurements that the nanoparticle assemblies exhibit ground-state phase transitions similar to those of randomly oriented polycrystalline samples of the parent materials. Resistivity and diamagnetic shielding measurements yield additional information on the functional nanoparticle structure in terms of stoichiometric and nonstoichiometric composition. © 2015 American Physical Society.


  • The interaction of carbon nanotubes with an invitro blood-brain barrier model and mouse brain invivo

    Kafa H., Wang J.T.W., Rubio N., Venner K., Anderson G., Pach E., Ballesteros B., Preston J.E., Abbott N.J., Al-Jamal K.T. Biomaterials; 53: 437 - 452. 2015. 10.1016/j.biomaterials.2015.02.083. IF: 8.557

    Carbon nanotubes (CNTs) are a novel nanocarriers with interesting physical and chemical properties. Here we investigate the ability of amino-functionalized multi-walled carbon nanotubes (MWNTs-NH3+) to cross the Blood-Brain Barrier (BBB) invitro using a co-culture BBB model comprising primary porcine brain endothelial cells (PBEC) and primary rat astrocytes, and invivo following a systemic administration of radiolabelled f-MWNTs. Transmission Electron microscopy (TEM) confirmed that MWNTs-NH3+ crossed the PBEC monolayer via energy-dependent transcytosis. MWNTs-NH3+ were observed within endocytic vesicles and multi-vesicular bodies after 4 and 24h. A complete crossing of the invitro BBB model was observed after 48h, which was further confirmed by the presence of MWNTs-NH3+ within the astrocytes. MWNT-NH3+ that crossed the PBEC layer was quantitatively assessed using radioactive tracers. A maximum transport of 13.0±1.1% after 72h was achieved using the co-culture model. f-MWNT exhibited significant brain uptake (1.1±0.3% injected dose/g) at 5min after intravenous injection in mice, after whole body perfusion with heparinized saline. Capillary depletion confirmed presence of f-MWNT in both brain capillaries and parenchyma fractions. These results could pave the way for use of CNTs as nanocarriers for delivery of drugs and biologics to the brain, after systemic administration. © 2015 The Authors.


  • Vertically Aligned ZnO/Inx S y Core-Shell Nanorods for High Efficient Dye-Sensitized Solar Cells

    Gonzalez-Valls I., Ballesteros B., Lira-Cantu M. Nano; 10 (7, 1550103) 2015. 10.1142/S1793292015501039. IF: 1.090

    Innovative vertically aligned ZnO/InxSy nanorod (NR) electrodes were prepared by successive ion layer adsorption and reaction (SILAR) technique. The InxSy shell layer was deposited on top of ZnO NR electrodes of two different lengths, ~1.6 μm and ~3.2 μm. Two sulfur contents on the InxSy shell layer with different layer thicknesses were analyzed. These electrodes were fully characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction spectroscopy (XRD), Energy-dispersive x-ray spectroscopy (EDS), Infrared spectroscopy (FT-IR), x-ray photoelectron spectroscopy (XPS) and ultraviolet photoemission spectroscopy (UPS) and then applied in dye-sensitized solar cells (DSC). Power conversion efficiency of 2.32% was observed when a low-sulfur content InxSy shell layer was applied in comparison to the stoichiometric In2S3 shell layer (0.21%) or the bare ZnO NRs (0.87%). In the case of low sulfur content, a shell layer of In(OH)xSy or/and In(OH)3 is formed as observed by the presence of-OH observed by FTIR analyses. The presence of higher amounts of hydroxide groups modifies the bandgap and work function of the InxSy shell and facilitates dye adsorption, increasing the final solar cell performance. © 2015 World Scientific Publishing Company. © 2015 World Scientific Publishing Company.


2014

  • Covalent functionalization of multi-walled carbon nanotubes with a gadolinium chelate for efficient T1-weighted magnetic resonance imaging

    Marangon, I.; Ménard-Moyon, C.; Kolosnjaj-Tabi, J.; Béoutis, M.L.; Lartigue, L.; Alloyeau, D.; Pach, E.; Ballesteros, B.; Autret, G.; Ninjbadgar, T.; Brougham, D.F.; Bianco, A.; Gazeau, F. Advanced Functional Materials; 24 (45): 7173 - 7186. 2014. 10.1002/adfm.201402234. IF: 10.439


  • Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers

    Avci, C.O.; Garello, K.; Nistor, C.; Godey, S.; Ballesteros, B.; Mugarza, A.; Barla, A.; Valvidares, M.; Pellegrin, E.; Ghosh, A.; Miron, I.M.; Boulle, O.; Auffret, S.; Gaudin, G.; Gambardella, P. Physical Review B - Condensed Matter and Materials Physics; 89: 21 - 214419. 2014. 10.1103/PhysRevB.89.214419. IF: 3.664


  • Four Molecular Superconductors Isolated as Nanoparticles

    de Caro, D; Faulmann, C; Valade, L; Jacob, K; Chtioui, I; Foulal, S; de Caro, P; Bergez-Lacoste, M; Fraxedas, J; Ballesteros, B; Brooks, J.S.; Steven, E; Winter, L.E. European Journal of Inorganic Chemistry; 2014 (24): 4010 - 4016. 2014. 10.1002/ejic.201402007. IF: 2.965


  • Production of water-soluble few-layer graphene mesosheets by dry milling with hydrophobic drug

    Rubio, N.; Serra-Maia, R.; Kafa, H.; Mei, K.-C.; Al-Jamal, K.T.; Luckhurst, W.; Zloh, M.; Festy, F.; Richardson, J.P.; Naglik, J.R.; Pach, E.; Ballesteros, B. Langmuir : the ACS journal of surfaces and colloids; 30 (49): 14999 - 15008. 2014. 10.1021/la5038475. IF: 4.384


  • Synthesis of PbI2 single-layered inorganic nanotubes encapsulated within carbon nanotubes

    Cabana, L.; Ballesteros, B.; Batista, E.; Magén, C.; Arenal, R.; Orõ-Solé, J.; Rurali, R.; Tobias, G. Advanced Materials; 26 (13): 2016 - 2021. 2014. 10.1002/adma.201305169. IF: 15.409


  • Ultraviolet pulsed laser irradiation of multi-walled carbon nanotubes in nitrogen atmosphere

    Pérez Del Pino, Á.; György, E.; Cabana, L.; Ballesteros, B.; Tobias, G. Journal of Applied Physics; 2014. 10.1063/1.4864776. IF: 2.185


2013

  • Effect of laser radiation on multi-wall carbon nanotubes: Study of shell structure and immobilization process

    György, E.; Pérez Del Pino, A.; Roqueta, J.; Ballesteros, B.; Cabana, L.; Tobias, G. Journal of Nanoparticle Research; 15 2013. 10.1007/s11051-013-1852-6. IF: 2.175


  • Fractal porosity in metals synthesized by a simple combustion reaction

    Gómez-Romero, P.; Fraile, J.; Ballesteros, B. RSC Advances; 3: 2351 - 2354. 2013. 10.1039/c2ra22441k. IF: 2.562


  • Magnetization reversal behaviour of planar nanowire arrays of Fe

    Arora, S.K.; ODowd, B.J.; Thakur, P.; Brookes, N.B.; Ballesteros, B.; Gambardella, P.; Shvets, I.V. Current Nanoscience; 9 (5): 609 - 614. 2013. 10.2174/15734137113099990069. IF: 1.356


  • Observation of out-of-plane unidirectional anisotropy in MgO-capped planar nanowire arrays of Fe

    Arora, S.K.; ODowd, B.J.; Polishchuk, D.M.; Tovstolytkin, A.I.; Thakur, P.; Brookes, N.B.; Ballesteros, B.; Gambardella, P.; Shvets, I.V. Journal of Applied Physics; 114 (13) 2013. 10.1063/1.4823514. IF: 2.210


2012

  • Deposition of functionalized single wall carbon nanotubes through matrix assisted pulsed laser evaporation

    Pérez Del Pino, Á.; György, E.; Cabana, L.; Ballesteros, B.; Tobias, G. Carbon; 50: 4450 - 4458. 2012. 10.1016/j.carbon.2012.05.023.


  • Magnetic properties of planar nanowire arrays of Co fabricated on oxidized step-bunched silicon templates

    Arora, S.K. ; O'Dowd, B.J.; Ballesteros, B.; Gambardella, P. ; Shvets, I.V. Nanotechnology; 23: 235702. 2012. .


  • Structural and magnetic properties of planar nanowire arrays of Co grown on oxidized vicinal silicon (111) templates

    Arora, S.K.; O'Dowd, B.J.; Nistor, C.; Balashov, T.; Ballesteros, B. ; Lodi Rizzini, A.; Kavich, J.J.; Dhesi, S.S.; Gambardella, P. ; Shvets, I.V. Journal of Applied Physics; 111: 07E342. 2012. .


  • Synthesis and characterization of CdSe/ZnS core-shell quantum dots immobilized on solid substrates through laser irradiation

    György, E.; Pérez Del Pino, A.; Roqueta, J.; Ballesteros, B.; Miguel, A.S.; Maycock, C.; Oliva, A.G. Physica Status Solidi (A) Applications and Materials; 209: 2201 - 2207. 2012. 10.1002/pssa.201127749.


2011

  • Heteroepitaxial orientation control of YSZ thin films by selective growth on SrO-, TiO2-terminated SrTiO3 crystal surfaces

    Cavallaro, A.; Ballesteros, B.; Bachelet, R.; Santiso, J. CrystEngComm; 13: 1625 - 1631. 2011. 10.1039/c0ce00606h.


  • One-dimensional composites based on single walled carbon nanotubes and poly(o-phenylenediamine)

    Baibarac, M.; Baltog, I.; Scocioreanu, M.; Ballesteros, B.; Mevellec, J.Y.; Lefrant, S. Synthetic Metals; 161: 2344 - 2354. 2011. 10.1016/j.synthmet.2011.09.001.


  • Orbital moment anisotropy of Pt/Co/AlOx heterostructures with strong Rashba interaction

    Nistor, C.; Balashov, T. ; Kavich, J. J.; Lodi Rizzini, A. ; Ballesteros, B. ; Gaudin, G. ; Auffret, S.; Rodmacq, B.; Dhesi, S.S.; Gambardella, P. Physical Review B; 2011. .


  • Polymer electrolyte membrane fuel cells | Pilas de combustible de membrana polimérica

    Asensio, J.A.; Peña, J.; Pérez-Coll, D.; Ruiz-Morales, J.C.; Marrero-Lopez, D.; Nuñez, P.; Ballesteros, B.; Canales-Vazquez, J.; Borrós, S.; Gómez-Romero, P. Afinidad; 68: 246 - 258. 2011. .


  • Sidewall functionalisation of carbon nanotubes by addition of diarylcarbene derivatives

    Luksirikul, P.; Ballesteros, B.; Tobias, G.; Moloney, M.G.; Green, M.L.H. Journal of Materials Chemistry; 21: 19080 - 19085. 2011. 10.1039/c1jm13783b.


  • Synthesis and laser immobilization onto solid substrates of CdSe/ZnS core-shell quantum dots

    György, E.; Pino, A.P.D.; Roqueta, J.; Ballesteros, B.; Miguel, A.S.; Maycock, C.D.; Oliva, A.G. Journal of Physical Chemistry C; 115: 15210 - 15216. 2011. 10.1021/jp203051b.


  • Synthesis and stabilization of subnanometric gold oxide nanoparticles on multiwalled carbon nanotubes and their catalytic activity

    Alves, L.; Ballesteros, B.; Boronat, M.; Cabrero-Antonino, J.R.; Concepción, P.; Corma, A.; Correa-Duarte, M.A.; Mendoza, E. Journal of the American Chemical Society; 133: 10251 - 10261. 2011. 10.1021/ja202862k.


  • Synthesis conditions, light intensity and temperature effect on the performance of ZnO nanorods-based dye sensitized solar cells

    Gonzalez-Valls, I.; Yu, Y.; Ballesteros, B.; Oro, J.; Lira-Cantu, M. Journal of Power Sources; 196: 6609 - 6621. 2011. 10.1016/j.jpowsour.2011.03.063.


  • Zinc oxide/carboxylic acid lamellar structures

    Segovia, M.; Lemus, K.; Moreno, M.; Ana, M.A.S.; González, G.; Ballesteros, B.; Sotomayor, C.; Benavente, E. Materials Research Bulletin; 46: 2191 - 2195. 2011. 10.1016/j.materresbull.2011.06.040.


2010

  • Carbon nanocapsules: Blocking materials inside carbon nanotubes

    Tobias, G.; Ballesteros, B.; Green, M.L.H. Physica Status Solidi (C) Current Topics in Solid State Physics; 7: 2739 - 2742. 2010. 10.1002/pssc.200983823.


  • Filled and glycosylated carbon nanotubes for in vivo radioemitter localization and imaging

    You Hong, S.; Tobias, G.; Al-Jamal, K.T.; Ballesteros, B.; Ali-Boucetta, H.; Lozano-Perez, S.; Nellist, P.D.; Sim, R.B.; Finucane, C.; Mather, S.J.; Green, M.L.H.; Kostarelos, K.; Davis, B.G. Nature Materials; 2010. .


  • pH-triggered release of materials from single-walled carbon nanotubes using dimethylamino-functionalized fullerenes as removable "corks"

    Luksirikul, P.; Ballesteros, B.; Tobias, G.; Moloney, M.G.; Green, M.L.H. Carbon; 48: 1912 - 1917. 2010. 10.1016/j.carbon.2010.01.053.


2009

  • Steam purification for the removal of graphitic shells coating catalytic particles and the shortening of single-walled carbon nanotubes

    B. Ballesteros; G. Tobias; L. Shao; E. Pellicer; E. Mendoza; M.L.H. Green Small; 4: 1501 - 1506. 2009. 10.1002/smll.200701283.


2006

  • Ionic and electronic conductivity of 5% Ca-Doped GdNbO4

    Haugsrud, R.; Ballesteros, B.; Lira-Cantú, M.; Norby, T. Journal of the Electrochemical Society; 153: J87 - J90. 2006. 10.1149/1.2203933.